2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 102

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 102

瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the SDM.

5. Ignition OFF, test for greater than 25 ohm between the control circuit terminals listed below and ground:

* Roof rail air bag control circuit terminal 1

* Roof rail air bag control circuit terminal 2

* Seat side air bag control circuit terminal 1

* Seat side air bag control circuit terminal 2

* Retractor pretensioner control circuit terminal 1

* Retractor pretensioner control circuit terminal 2

瀚慖f less than the specified range, test the control circuit for a short to ground. If the circuit tests normal, replace the SDM.

6. Install a 3 A fused jumper wire between the control circuit terminals listed below.

* Left roof rail airbag terminal 1 and 2

* Right roof rail airbag terminal 1 and 2

* Driver seat side airbag terminal 1 and 2

* Passenger seat side airbag terminal 1 and 2

* Driver seat belt retractor pretensioner terminal 1 and 2

* Passenger seat belt retractor pretensioner terminal 1 and 2

7. Verify the scan tool Deployment Loop Resistance parameter is less than 2 ohm.

瀚慖f greater than the specified range, test both control circuits terminals for an open/high resistance. If the circuits test normal, replace the

SDM.

8. If all circuits test normal, replace the roof rail air bag, seat side air bag, or seat belt pretensioner.

DTC B0019-B0020

1. Ignition OFF, disconnect the scan tool and disconnect harness connector X200.

2. Wait for 120 seconds and then test for greater than 25 ohm between the appropriate control circuit terminals listed below on the SDM side of

the connector:

* Passenger instrument panel airbag stage 1 terminal 5 and 6 X1

* Passenger instrument panel airbag stage 2 terminal 8 and 7 X1

瀚慖f less than the specified range, test for a short between the control circuits, check each connector and CPA to ensure that the shorting

bars are lifted. If the circuits and shorting bars tests normal, replace the SDM.

3. Ignition ON, test for less than 11 V between the control circuit terminals listed below and ground on the SDM side of the connector:

* Control circuit terminal 5 X1

* Control circuit terminal 6 X1

* Control circuit terminal 8 X1

* Control circuit terminal 7 X1

瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the SDM.

4. Ignition OFF, test for greater than 25 ohm between the control circuit terminals listed below and ground on the SDM side of the connector:

* Control circuit terminal 5 X1

* Control circuit terminal 6 X1

* Control circuit terminal 7 X1

* Control circuit terminal 8 X1

瀚慖f less than the specified range, test the control circuit for a short to ground. If the circuit tests normal, replace the SDM.

5. Install a 3 A fused jumper wire between the control circuit terminals listed below.

* Passenger instrument panel airbag stage 1 terminal 5 and 6 X1

* Passenger instrument panel airbag stage 2 terminal 8 and 7 X1

6. Verify the scan tool Deployment Loop Resistance parameter is less than 2 ohm.

瀚慖f greater than the specified range, test both control circuits terminals for an open/high resistance. If the circuits test normal, replace the

SDM.

7. Disconnect the passenger instrument panel air bag harness connector.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 705

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 705

瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K9 BCM.

瀚慖f the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuits test normal, replace

the K9 BCM.

7. If all the circuits test normal, replace the appropriate right marker lamp

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Tail Lamp Replacement (See: Lighting and Horns/Tail Lamp/Service and Repair)

* Headlamp Replacement (See: Lighting and Horns/Headlamp/Service and Repair/Removal and Replacement/Headlamp Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup and programming

B3873

DTC B3873

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC B3873 02

- Front Washer Relay Circuit Short to Ground

Diagnostic Fault Information

Circuit/System Description

The body control module (BCM) controls the windshield washer fluid pump based on an input from the turn signal/multifunction switch. The BCM

monitors the washer switch through the windshield washer switch signal circuit. When the wash switch is closed, ground is supplied to the front

washer switch signal circuit. When this is the case, the BCM will command the windshield washer fluid pump and the low speed wipers on.

Conditions for Running the DTC

* Ignition ON.

* The system voltage is between 9-16 V.

Conditions for Setting the DTC

A short to ground is detected in the windshield washer relay control circuit.

Action Taken When the DTC Sets

Washer operation is suspended.

Conditions for Clearing the DTC

A current DTC clears when the diagnostic runs and passes.